Brake lining mounting, especially for rail vehicles

ABSTRACT

The invention relates to a brake lining mounting, especially for rail vehicles, comprising a lining support which is encompassed at both of its longitudinal ends by guide sections, preferably at least partially by the plates of a lining holder which holds the friction lining. A pin is provided on the lining support and is able to move perpendicularly to the lining support. When the pin is placed under spring tension as the lining holder is pushed up onto the lining support, the pin extends through an opening provided in the lining holder in such a way that the lining holder is stopped on the lining support by this single pin and cannot move in relation to the lining support. At least one spring in the form of a spring clip acts on the pin. The spring clip can be moved into a raised release position against the force of its own tension, carrying the pin with it. The pin is thus released from its engagement with the opening in the lining holder in such a way that when the pin is in its release position, the lining holder can be pushed away from the lining support.

BACKGROUND AND SUMMARY OF THE INVENTION

The invention relates to a brake lining mounting and more specifically,to slide mounting of brake lining with a lock.

In the case of known brake lining mountings, which have a so-calleddovetail guide, a face-side stop is provided for the inserted brakelining as well as a cross bar which can be swivelled after the brakelining is slid in. This crossbar can also be guided on the support in afoldable or rotatable manner. Such supports are known as UIC supports.

In another known construction, two offset pins are provided at adistance from the friction lining length on the support. When the liningholder is inserted, semicircular recesses of the holder plate reachbehind the two pins. The detaching of the lining holder from the liningsupport is prevented by means of a lock spring of the lining supportwhich reaches behind a holding lug of the lining holder. Lining supportsare also known, wherein the lining is held by two pins, one pin beingsituated on a swivellable locking bar which can be opened up forchanging the lining.

The standard solutions have in common that the friction or brake liningsare held at both ends by means of stops. A lining, which is “enclosed”in such a manner, must therefore be provided with a larger axial play sothat it is not clamped in during the heating (several 100° C. duringbraking). The result would be damage to the support or deformations ofthe lining. However, the larger plays in dynamically loaded componentswhich take this situation into account are the reason for a prematurewearing-out of the mutually contacting parts. In addition, increasedrattling noises are to be expected here.

Based on the above, it is an object of the invention to further developa brake lining mounting of the initially mentioned type such that, inits assignment to the brake lining support, the brake lining will not beexposed to the above-mentioned problems. Simultaneously, the possibilityis to be provided of mounting the lining holder carrying the brakelining in a simple and fast manner on the lining support and demountingit therefrom.

The features of the present invention are used for achieving thisobject.

Because of the use of a single pin on one of the front ends of thelining support, the fixing, thus the non-displaceable arresting of thelining holder with respect to the lining support is ensured. As theresult of the guides which exist between the lining holder and thelining support and which are in a mutual engagement, the lining holdercan be pushed in a simple manner onto the lining support when the pin isin the release position. Until the opening situated at the front end ofthe lining holder comes to be congruent with the pin, and under thespring force, this pin can be released into its arresting position. Thedemounting of the lining holder takes place in a correspondingly simplemanner after the pin has been lifted out of its arresting position. Thelining holder preferably has a symmetrical configuration; that is, oneach of the two front ends, the opening is situated which is used foraccommodating the pin. This means that the lining holder with the brakelining can be used in a left-hand as well as in a right-handconstruction on lining supports. In which case, in the mounted position,one of the openings respectively of the front ends remains open.

The releasing of the pin, thus the lifting of this pin out of theopening of the lining holder, can be carried out in a simple mannermanually or by means of a lever-type tool. For exercising a spring forceon the pin, a spring clip and a spring acting within the lining supportwith respect to the pin are preferably provided. This represents asafety aspect during the arresting of the lining holder.

Advantageous developments and further developments are indicated in theadditional claims.

Other objects, advantages and novel features of the present inventionwill become apparent from the following detailed description of theinvention when considered in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partially cut partial lateral view of the front end of alining support with a lining holder guided thereon, illustrating the pinforming the locking between the lining support and the lining holder,the position of the spring clip in the arresting position beingindicated by solid lines and in the release position being indicated bydash-dotted lines;

FIG. 2 is a partial top view of the arrangement according to FIG. 1 notshowing the lining holder;

FIG. 3 is a view of another embodiment according to the invention whichis comparable to that of FIG. 1; and

FIG. 4 is a view of another embodiment according to the invention whichis comparable to that of FIGS. 1 and 3.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In a partially cut partial lateral view, FIG. 1 of the drawing shows alining support 1 on which a lining holder 5 is mounted which carries afriction lining 3. In a manner not explained in detail, the frictionlining 3 consists of several lining elements which are mountedswivellably in all directions on the lining holder 5 under springtension. By means of lugs forming grooves, the lining holder 5 can bepushed onto the lining support 1. The lugs reach such on both sides ofthe lining support 1 around guide strips, which preferably extend in acurved manner. Thus the lining holder 5 with the lining elements mountedon it can be slid from one of the front sides, preferably from the frontside of the lining support facing the rail, onto this lining support 1.

According to FIG. 1, a pin 7 is guided on the lining support 1 andpenetrates, under spring tension (19, 35) an opening 9 of the liningholder 5 in its pushed-on position such that the lining holder 5 issecured against a displacement on the lining support 1. In its verticalposition, the pin 7 can be displaced with respect to the lining supportunder spring tension and, in the illustrated embodiment, is guided in abore of the lining support 1 which is offset in steps. The step-typebore is formed by bushing 11 and 13, of which the bushing 11 is pressedin from the top side of the lining support 1 and is used for guiding anarrow pin section 15. The wider pin section 17, which can be displacedthrough the underside of the lining support 1 is arranged in the bush 13on the underside of the lining support 1.

A spring clip 19 (FIGS. 1 and 2), which is preferably inserted in thecenter into a slot 21 on the top side of the pin 7, acts upon the topside of the pin 7. The end section of the spring clip 19, which is onthe left in FIG. 1, is coiled twice, and the end of the spring clip isinserted in a bore 23 (FIG. 2) of the lining support 1. As the result ofthis shaping of the spring clip 19 in its section which is on the leftin FIG. 1, the spring clip 19 has in its right section adownward-directed bracing such that the spring clip 19 has the tendencyof displacing the pin 7 in the downward direction so that it extendsinto the opening 9 of the lining holder 5 and thereby arrests it withrespect to a displacement.

The spring clip 19 is caught on the one side by the base of the slot 21accommodating it in the pin head and, on the other side, is caught by asecuring pin 25 penetrating the pin head. In the illustration accordingto FIG. 1, the securing pin 25 therefore extends above the spring clip19. The pin 7 can be lifted from the arresting position illustrated inFIG. 1 in the upward direction into the opened position illustrated by adash-dotted line, by means of a tool or manually. The spring clip 19 islifted upward on its end which is on the right in the drawing. Thespring clip 19 is therefore subject to a double function; that is, itcan exercise a downward force with respect to the pin 7 and it issimultaneously used for lifting the pin out of its arresting position.

Depending on the spring force to be overcome, the lifting of the springclip can take place manually, thus without any tool, but also by meansof, for example, a flat tool 26 which, according to the dash-dottedrepresentation in FIG. 1, is used on a shoulder 27 on the top side ofthe lining support and is rotated while acting with respect to thespring clip, until this spring clip 19 has reached the lifted positionillustrated in FIG. 1 by a dash-dotted line. In order to hold the springclip 19 in the lifted position, the end 29, which, in the loweredposition, penetrates a slot 31 at the end of the lining support, can beplaced on a step 33 laterally with respect to the slot 31. In this case,it is possible to provide the end 29 of the spring clip 19 in additionwith a defined lateral bracing such that the spring clip automaticallytakes up the locking position on the step 33 when the end 29 is liftedout of the slot 31.

According to FIG. 1, a second spring 35 acts upon the pin 7, whichspring 35 is supported on one side on the bush 11 and on the other sideon the top side of the wider pin section 17. Like the spring clip 19,spring 35 has the tendency of displacing the pin 7 into the arrestingposition with respect to the lining holder illustrated in FIG. 1. Inaddition to the spring clip 19, the spring 35 is used for holding thepin 7 in the above-explained manner in its arresting position. Thespring 35 simultaneously provides a certain safety function if thespring clip 19 should break during the operation. Thereby it is alwaysensured that the pin 7 cannot leave the arresting position with respectto the lining holder 5; that is, an unintentional detaching of thelining plate or of the lining holder 5 from the lining support 1 isabsolutely impossible.

In the case of the variant of the pin illustrated in FIG. 3, a step 37is provided on this pin 7 in the area of the base of the lining support1. The step 37 has a diameter which is slightly larger than the diameterof the opening 9 in the lining holder 5 receiving the pin end. Thismeans that the pin cannot slide through the bore 9 in the lining holder5 if, on the top side of the pin 7, the spring clip 19 and the securingpin 25 are unhooked or destroyed. In each case, it is avoided that thepin 7 slides through the opening 9 in the lining holder 5 and acts uponthe back side of the friction lining 3 (which is not shown in FIG. 3).Furthermore, the step 37 defines precisely the insertion depth of thepin 7 in the opening 9 of the lining holder. A collision with the backside of the lining elements 3, etc. forming the friction lining istherefore prevented in a simple manner. Basically, it is also possibleto provide, on the top side of the pin 7, a step in the form of a snapring 19 which comes to rest, for example, on the bushing 13 and whichdetermines the insertion depth of the pin 7. The spring clip 19 can alsobe used for this purpose if it is supported in its lowered position onthe top side of the bushing 13 and, on its back side, catches thesecuring pin which is pulled downward under tension by the spring 35.

FIG. 4 of the drawing illustrates an embodiment in which the pin 7 is ina screwed connection with respect to the bore 40 receiving it in thelining support 1 by means of a non-self-locking movement thread. In thepresent case with respect to the bush 11. A spring 41 presses the pin 7into the opening 9 while rotating. The pin head is constructed as apolygon 39 to which a tool can be applied in order to rotate the pin 7for the purpose of the lifting out of the opening 9.

What is claimed is:
 1. A brake lining mounting for a disc brakecomprising: a lining support; a lining holder carrying a friction liningand slidably mounted from one of the front sides on the lining supportin a transverse direction to brake application; lugs, forming grooves,extend on both sides of the lining support around guide strips whichextend from the lining support; a single pin guided in the liningsupport and displaced perpendicularly to the sliding direction of thelining holder; the pin being received in an opening on the lining holderwhen the opening is adjacent the pin in a mounting position of thelining holder; and wherein the lining holder and lining support arereleasably secured to each other by the lugs, guide strips and pin.
 2. Abrake lining mounting according to claim 1, wherein a) when the liningholder is in the mounted position, the pin can be displaced under springtension into the opening on the lining holder, and b) for the purpose ofreleasing the lining holder, the pin can be lifted under spring tensionout of the opening of the lining holder.
 3. A brake lining mountingaccording to claim 1, including a) a spring clip acting upon the pinhead and displacing the pin into an arresting position in the opening ofthe lining holder, and (b) the spring clip, while taking along the pin,can be lifted into a release position in which the pin is lifted out ofthe opening of the lining holder.
 4. A brake lining mounting accordingto claim 3, wherein a) the spring clip is inserted in a slot of the pinhead and is caught between the slot bottom and a securing pin which canbe inserted on the pin head, b) a first end section of the spring clipis fixed on the lining support, c) a second end section of the springclip opposite the pin can be displaced between a lifted release positionand a lowered arresting position.
 5. A brake lining mounting accordingto claim 4 wherein the second end section of the spring clip can bearrested in the lifted release position on a top side of the liningsupport.
 6. A brake lining mounting according to claim 4 wherein thesecond end section of the spring clip can be arrested in the liftedrelease position on a step on the top side of the lining support.
 7. Abrake lining mounting according to claim 3 wherein the pin is guided ina stepped bore of the lining support such that a pin section facing theopening has a larger diameter than an opposite pin section which carriesthe spring clip and which ends as a pin head.
 8. A brake lining mountingaccording to claim 7, wherein the two pin sections of the pin aredisplaceably guided in bushings pressed into the lining support.
 9. Abrake lining mounting according to claim 8, including a second springwhich tensions the pin in the direction of the opening of the liningholder.
 10. A brake lining mounting according to claim 9, wherein a) thesecond spring surrounds the pin section of the smaller diameter, and b)the second spring is supported on one side on the underside of thebushing guiding the smaller diameter pin section and, on the other side,on the top side of the pin section of the larger diameter such that thesecond spring, is capable of tensioning the pin into the openingprovided in the lining holder.
 11. A brake lining mounting according toclaim 9 wherein the second spring can be tensioned by lifting the pin bymeans of the spring clip.
 12. A brake lining mounting according to claim1 wherein the insertion depth of the pin with respect to the openingprovided in the lining holder is determined by a step on the pin.
 13. Abrake lining mounting according to claim 1 wherein the pin is guided onthe lining support (1) on a lower end of the lining support facing arail.
 14. A brake lining mounting according to claim 1, wherein the pinis screwed to a threaded bore of the lining support and by rotating, thepin can be inserted into the opening of the lining holder and can belifted out of the opening.
 15. A brake lining mounting according toclaim 14, including a spring which surrounds the pin and tensions it inthe direction of the opening of the lining holder.